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... to northern Sonora, Mexico. They are also found in Africa and South America. Mima Mounds are formed of soil and small stones. They are often 2 meters high, with diameters of 20 meters. Mound densities can reach 25-50 per hectare. Mima Mounds, prai-rie mounds, pimple mounds, or whatever they are called locally, are widely thought to be the work of pocket gophers, although this hypothesis is still contested, as we shall see below. No one denies that pocket gophers are often associated with the mounds. In fact, a recent scientific paper describes the relationship between the sizes and shapes of the mounds and the numbers of resident gophers. The authors of this paper, G.W . Cox and J. Hunt, state confidently that: The ... waves intersect, an interference pattern forms. Loose surface material collects at points of minimum surface disturbance (open circles). "Investigations of Mima mounds in western North America support the hypothesis that mounds are formed by the gradual translocation of soil by pocket gophers..." (Cox, George W., and Hunt, Jodee; "Form of Mima Mounds in Relation to Occupancy by Pocket Gophers," Journal of Mammalogy, 71:90, 1990.) In another paper, appearing at almost the same time, A.W . Berg contends that the Mima Mounds could instead be the consequence of seismic activity. In his abstract he says: "Small-scale Mima mounds can be produced experimentally by subjecting a plywood board covered with a thin veneer of loess to impacts that ...
Terms matched: 2 - Score: 248 - 15 May 2017 - URL: /sf069/sf069g10.htm
... they stretched for more than 20 miles. If, as some have estimated, they are about 6,000 years old, they were originally twice as high before the elements wore them down. The big question is and always has been: How were these large heaps of churned-up sand, fine gravel, and decayed vegetable matter formed? One has to smile at the dominant theory: pocket! Sure! pocket gophers are bundles of digging energy, but each Mima Mound contains about 100 tons of soil. Multiply that figure by the thousands of mounds, and you begin to wonder about the gopher theory. Also counting against the gophers is the fact that no one has ever found gophers in the mounds, nor has a single gopher bone been found. Now Mima Mounds are found ... great numbers in many other locations in North America. South America and Africa also have their "pimpled plains" as the early geologists called them. A. Berg has pointed out that Mima Mounds tend to be concentrated in seismically active areas, whereas pocket gophers and their kindred rodent excavators have a more general distribution. This observation has led Berg to theorize that earthquake vibrations rather than gophers raised the Mima Mounds. Indeed, if you sprinkle sand on a vibrating surface in the lab, you do see tiny mounds of sand rising mysteriously. (SF#69, SF#91, SF#108) Working against Berg's theory is the rather poor geographical match between the fields of Mima Mounds and areas of high seismicity. (Geiger, Beth; "Heaps of Confusion," ...
Terms matched: 2 - Score: 209 - 15 May 2017 - URL: /sf119/sf119p09.htm
... , too. At elevations of 1500-3600 meters on Mt. Kenya, fields of mounds up to 6 meters in diameter and 1.5 meters high have been described. Cox and Gakahu have studied some of these African mounds and find them much like the North American Mima Mounds. They are found well above the range of the rhizomyid mole rat, a rodent similar to the North American pocket gopher in size and behavior. Quantitative measurements indicate the mounds to be constructed from dirt immediately surrounding the mounds. In short, the African mounds and probably those of North America seem to be the products of industrious rodents. (Cox, George W., and Gakahu, Christopher G.; "The Formation of Mima Mounds in the Kenya Highlands: A Test of the Dalquest-Scheffer ... ," Journal of Mammalogy, 65:149, 1984.) From Science Frontiers #33, MAY-JUN 1984 . 1984-2000 William R. Corliss ...
Terms matched: 2 - Score: 151 - 15 May 2017 - URL: /sf033/sf033p15.htm
... 's going on. (Kerr, Richard A.; "Strange Doings on a NEAR-Struck Asteroid," Science, 291: 1467, 2001.) Comment. It is interesting to observe how vibrations may emulate the action of water in creating sandy topography. As a terrestrial case in point, the famed Mima Mounds in Washington state may have been created not by flowing water or pocket gophers but by earthquake vibrations. (SF#91 and SF#108) From Science Frontiers #135, MAY-JUN 2001 . 2001 William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy, ancient history, mythology and astronomy. Lobster . The journal of intelligence and political conspiracy (CIA, FBI, JFK, MI5, NSA, etc) Homeworking.com . ... resource for people thinking about working at home. ABC dating and personals . For people looking for relationships. Place your ad free. ...
Terms matched: 2 - Score: 131 - 15 May 2017 - URL: /sf135/sf135p02.htm
